glashow



May 15, 1928.

L. GLASHOW STEAM BOILER 2 Sheets-Sheet l Original Filed Sept. 24, 1925' wo o 4 ooo OOO

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L. GLAsl-iow S TEAM B0 I LER Original Filed Sept- 24, 1925 2 Simens-sheetv 12` YI-Eg 1 ENTO BY Mv/ ATTO NEY- Reissued May .115, 1928. l I i j Re. j "UNITED STATES PA'I'EN'I';2OFFICE.l

LEWIS' GLAsHoW, or NEW Yami, N. IY.'

i STEAM norman.`

AOriginal No. 1,641,162, dated September 6, 1827, Serial 120.58231, filed September 24, 1925. Application for reissue filed Februaryl 29, r1928. Serial No. 258,100.

The `present invention j relates to steam boilers and has for its object to provide means for improving the efiicicncy and the durability thereof.`

Another Objectis to so construct said means that the same can be easily `and conveniently installed in an existing old type boiler in which the lire box is made of bricks,

without changing the general .construction of the boiler and lire box thereof.

The old style boilers having brick iire boxes are still ingeneral use. These, however, have been found to be objectionable for the reason that the brick walls and arch of the fire box absorb a considerable amount of heat and the fire box quickly burns out, requiring frequent repairs.

To remedy these evils under ordinary circumstances would require the discarding of the old boiler and the installation of a new type boiler having an all steel fire box, which, of course, would be very expensive. I have found, however, that with comparatively small expense it is possible to save the old boiler and render it very eflicient and durable by simply removing the brick side walls and arch and substituting therefor a water jacket and connecting the latter to the boiler tubes and steam system, so that there is a continuous water circulation through said jacket. box, owing to the water cooling, not only be rendered very durable, but the produc tion of steam greatly accelerated.

My invention will be understood by reference to the accompanying drawing in which similar reference characters denote corresponding parts land in which Fig. l

is a longitudinal section of the boiler;- Fig. 2 af cross-section thereof on line 2 2.

of Fig. 1; Fig. 3 a longitudinal section on line 3 3 of Fig. 1; Fig. 4 a detail in section showing the connection between two sections of the casing, and Fig.'5 a perspective view of the water jacket.

In the drawing, a denotes the boiler proper, a' the tubes thereof, b and c the front and rear brick walls for the support of the ire box and of the' grates d.

In the old structure the side walls and arch piece of the re box are formed by bricks, which as has been heretofore stated, absorb a great deal of the heat necessary for the production of steam and quickly burn out. My invention consists in the pro- Thereby will the fire vision of a metal fire boxstructure, which can be conveniently and cheaply installed into the space left vacant, after the removal of said bricks, without making any material changes .in thegeneral construction of the boiler, and whereby the'aforenamedobjec- `tions will be obviated.

. The new fire box structure 10 in plan'view is substantially U-shaped, the longitudinal parts 11 thereof serving as inner side walls of the fire box and the cross piece 12 as the end piece and bothsaid parts being made of tightly closed casings to form water jackets. The longitudinal jackets 11 are preferably each com'sposed of two or more sections of substantially rectangular cross section. Thecross piece 12 is a single hollow body having a central arched recess 13 at the bottomto serve as the opening leading into the fire boxI and to be closed as usual by doors. This opening, as with that of the brick arches, has its side walls 14C and i upper wall 15 arched, by makinglits side walls and top slanting as best shown in per-` spective in Fig. 5. The sections of the side jackets 11 are made to communicate with one another and with the end parts of the cross piece 12 by suitable means, as, for instance, hollow? push nipples 16, and are joined together by screw bolts, as at 17. The jackets are connected to the water space of the boiler and steam or water system by a system of pipes 18, so that `the water will circulate through the jackets 11 and 12 of the tire box and produce the eect stated. It will be seen that by my invention a boiler of the old type in use in apartment houses or the like can be saved with comparatively small expense.

Toincrease the heating capacity of the jackets, the inner surfaces of the side parts are corrugated as at 19.

As a safety means, I provide a fusible plug 2() in the upper end of the slanting wall 15, so that when there is no water in the boiler the fuse will burn out and this will indicate to the attendant that the boiler must be filled.

The sideparts of the jackets may have brass plugs 21 for cleaning purposes. f d

What I claim is 1. As an article of manufacture, a metal fire box adapted for installation in an old steanr boiler in lieu of the brick tire box thereof, said metal ire box consisting of a hollow end 'jacket having a recess to form an arch, and hollow side jackets separably 1 connected to said end jacket and each composed of separable sections communicatimovl with one another and with-said end jacket.

2. As an article of manufacture, a metal fire box adapted for installation in an old steam boiler in lieu of the brick {irebox thereof, said metal rebox consisting of a hollow end jacket havinga recess whose walls are slanting inwardly to form an arch, and two hollow side jackets separably connected to said end jacket and each composed of sep` arable sections communicating withy one 'another and with said end jacket, and a system of pipes for connecting said rebox to the water space of said steam boiler.

3. As an article of manufacture, a metalY composed of separable sections 'communicat' ing with one another and with said end Water jacket.

In testimony whereof I ailix my'signature.

LEWIS GLASHOW. 

